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The Geology of Texas - Volume 1 - Stratigraphy
BRAD FORMATION
" The Brad formation consists chiefly of shales and
limestones. The members now recognized are the Placid shale and Ranger
limestone. In the Brazos River valley the members originally
recognized were the Seaman Ranch beds and the Ranger limestone (1228, p.
109). In Wise County the Adams Branch limestone is wanting, and in this
county the shales and sandstones from the Devils Den limestone to the Ranger
limestone have been named the Ventioner beds (1398b). The Ranger
limestone may be followed northeast into Wise County, where it passes
under the Cretaceous. Type locality: The type locality is at Brad in
Palo Pinto County; thickness, 125 to 200 feet. "
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